Pen



FIG. 1 is a perspective view of a pen showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a right side view thereof; the left side view is a mirror image of the right side;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a perspective view shown through the transparent clip.

The broken lines are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a pen, as shown and described. 